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Acid Waters in Wales (Paperback, Softcover reprint of the original 1st ed. 1990)
Loot Price: R4,249
Discovery Miles 42 490
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Acid Waters in Wales (Paperback, Softcover reprint of the original 1st ed. 1990)
Series: Monographiae Biologicae, 66
Expected to ship within 10 - 15 working days
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Total price: R4,259
Discovery Miles: 42 590
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This book brings together research into the process of stream
acidification and its impact on Welsh surface waters, carried out
over the past decade or so. It is perhaps surprising that not until
the 1980's was clear evidence of stream acidification assembled. In
Wales, concerns over pollution had focused water quality sampling
principally on the areas of traditional heavy industry and large
urban popula tions served by inadequate sewerage systems and sewage
disposal arrange ments. Mistakenly, it had been assumed that, with
its prevailing westerly winds, Wales would receive precipitation
substantially unpolluted by the industrial and urban emissions from
Britain and mainland Europe. Assurance of the high quality of Welsh
upland streams, the traditional nursery ground of salmonids, was
eroded particularly by studies in the vicinity of Llyn Brianne
reservoir in the catchment of the River Tywi of Central Wales.
These demonstrated a clear correspondence between the biological
quality and fisheries of streams in the catchment and aspects of
stream chemistry, par ticularly pH, aluminium and calcium on the
one hand, and catchment land use on the other. It is salutary to
record that the first signals were of an inexplicable failure of
the runs of migratory salmonids into the upper catchment, occupied
by the Llyn Brianne reservoir and its influent streams, and the
failure to restore the fishery by re-stocking with eggs and fry.
Only then did the significance of the recent decline in some other
upland lake and reservoir fisheries in Wales become apparent.
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